mucous stomach with atrophic gastritis. infographics. on background

anatomy biology biotechnology catarrhal cellular chronic colonic digestion digestive dilatation dna dog duodenum egd endoscopy enkephalin esophagus gastric gastritis gastro gastroscopy glands helicobacter histology human inflammation ligament magnification medical medicine membrane mesothelium micrograph microscope microscopic molecule mucous oncology organ peptide physiology pits prepared pyloric reticulum science skin slide sphincter stomach system tissue ulcer vascular vasointestinal